پراکندگی نور توسط ذرات غیرکروی: نظریه، اندازه‌گیری‌ها و کاربردها

San Diego: Academic, 2000. - 690 p. Scattering patterns for particles of a single size are usually burdened by the so-called interference structure. This effect is demonstrated by the figure on the cover, which shows T-matrix computations of the degree of linear polarization versus scattering angle and surface-equivalent-sphere size parameter for an oblate spheroid with an aspect ratio of 1.7 and a refractive index of 1.53 + 0.008i. The spheroid has a fixed orientation with respect to the incident beam, and the scattering plane is defined as a plane through the incident beam and the spheroid axis. The figure displays a characteristic butterfly wing pattern composed of sharp alternating maxima and minima. These strong oscillations of polarization within a small range of scattering angle and/or size parameter are a typical manifestation of the interference structure and make comparisons of scattering characteristics of different monodisperse particles particularly difficult. From a modified version of Plate 2.1. Refer to Chapter 2 for more details. There is hardly a field of science or engineering that does not have some interest in light scattering by small particles. For example, this subject is important to climatology because the energy budget for the Earth's atmosphere is strongly affected by scattering of solar radiation by cloud and aerosol particles, and the whole discipline of remote sensing relies largely on analyzing the parameters of radiation scattered by aerosols, clouds, and precipitation. The scattering of light by spherical particles can be easily computed using the conventional Mie theory. However, most small solid particles encountered in natural and laboratory conditions have nonspherical shapes. Examples are soot and mineral aerosols, cirrus cloud particles, snow and frost crystals, ocean hydrosols, interplanetary and cometary dust grains, and microorganisms. It is now well known that scattering properties of nonspherical particles can differ dramatically from those of "equivalent" (e.g., equal-volume or equal-surface-area) spheres. Therefore, the ability to accurately compute or measure light scattering by nonspherical particles in order to clearly understand the effects of particle nonsphericity on light scattering is very important.
The rapid improvement of computers and experimental techniques over the past 20 years and the development of efficient numerical approaches have resulted in major advances in this field which have not been systematically summarized. Because of the universal importance of electromagnetic scattering by nonspherical particles, papers on different aspects of this subject are scattered over dozens of diverse research and engineering journals. Often experts in one discipline (e.g., biology) are unaware of potentially useful results obtained in another discipline (e.g., antennas and propagation). This leads to an inefficient use of the accumulated knowledge and unnecessary redundancy in research activities.
This book offers the first systematic and unified discussion of light scattering by nonspherical particles and its practical applications and represents the state-of-the-art of this important
research field. Individual chapters are written by leading experts in respective areas and cover three major disciplines: theoretical and numerical techniques, laboratory measurements, and practical applications. An overview chapter provides a concise general introduction to the subject of nonspherical scattering and should be especially useful to beginners and those interested in fast practical applications. The audience for this book will include graduate students, scientists, and engineers working on specific aspects of electromagnetic scattering by small particles and its applications in remote sensing, geophysics, astrophysics, biomedical optics, and optical engineering.



* The first systematic and comprehensive treatment of electromagnetic scattering by nonspherical particles and its applications
* Individual chapters are written by leading experts in respective areas
* Includes a survey of all the relevant literature scattered over dozens of basic and applied research journals
* Consistent use of unified definitions and notation makes the book a coherent volume
* An overview chapter provides a concise general introduction to the subject of light scattering by nonspherical particles
* Theoretical chapters describe specific easy-to-use computer codes publicly available on the World Wide Web
* Extensively illustrated with over 200 figures, 4 in color This book offers the first systematic and unified discussion of light scattering by nonspherical particles and its practical applications and represents the state-of-the-art of this important research field. Individual chapters are written by leading experts in respective areas and cover three major disciplines: theoretical and numerical techniques, laboratory measurements, and practical applications. An overview chapter provides a concise general introduction to the subject of nonspherical scattering and should be especially useful to beginners and those interested in fast practical applications. The audience for this book will include graduate students, scientists, and engineers working on specific aspects of electromagnetic scattering by small particles and its applications in remote sensing, geophysics, astrophysics, biomedical optics, and optical engineering This book offers the first systematic and unified discussion of light scattering by nonspherical particles and its practical applications, and represents the state-of-the-art of this important research field. Individual chapters are written by leading experts in respective areas and cover three major disciplines: theoretical and numerical techniques, laboratory measurements, and practical applications. An overview chapter provides a concise general introduction to the subject of nonspherical scattering and should be especially useful to beginners and those interested in fast practical applications. The audience for this book includes graduate students, scientists, and engineers working on specific aspects of electromagnetic scattering by small particles and its applications in remote sensing, geophysics, astrophysics, biomedical optics, and optical engineering.